WO1998027663A3 - Systeme d'amelioration de la qualite d'un signal radio reçu - Google Patents

Systeme d'amelioration de la qualite d'un signal radio reçu Download PDF

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Publication number
WO1998027663A3
WO1998027663A3 PCT/US1997/022605 US9722605W WO9827663A3 WO 1998027663 A3 WO1998027663 A3 WO 1998027663A3 US 9722605 W US9722605 W US 9722605W WO 9827663 A3 WO9827663 A3 WO 9827663A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
signals
antennas
transmits
reduce
Prior art date
Application number
PCT/US1997/022605
Other languages
English (en)
Other versions
WO1998027663A2 (fr
Inventor
Sandeep Chennakeshu
Gregory E Bottomley
Paul W Dent
Original Assignee
Ericsson Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ericsson Inc filed Critical Ericsson Inc
Priority to AU55210/98A priority Critical patent/AU5521098A/en
Priority to CA002275283A priority patent/CA2275283C/fr
Priority to BR9713943A priority patent/BR9713943A/pt
Priority to EP97951614A priority patent/EP0947058B1/fr
Priority to DE69721048T priority patent/DE69721048T2/de
Priority to JP52779698A priority patent/JP4104023B2/ja
Publication of WO1998027663A2 publication Critical patent/WO1998027663A2/fr
Publication of WO1998027663A3 publication Critical patent/WO1998027663A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0891—Space-time diversity
    • H04B7/0894—Space-time diversity using different delays between antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H04B1/715—Interference-related aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
    • H04B7/0671—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using different delays between antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/084—Equal gain combining, only phase adjustments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements
    • H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
    • H04B1/126—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means having multiple inputs, e.g. auxiliary antenna for receiving interfering signal

Abstract

On crée un étalement du temps de propagation dans la transmission d'un signal radio numérique de manière à réduire la largeur de bande de cohérence et à faciliter les sauts de fréquence permettant la réduction des pertes d'affaiblissement au sein d'un environnement de propagation fermé. L'étalement du temps de propagation est introduit dans le signal de plusieurs manières. Un procédé de l'invention met en oeuvre un émetteur (21) pourvus de deux antennes distinctes (26, 27), l'une de ces antennes émettant le signal numérique et l'autre émettant le même signal après introduction d'un retard de phase dans le signal. La fréquence porteuse des signaux effectue des sauts entre au moins deux fréquences et le récepteur traite les signaux reçus. Selon une autre réalisation de l'invention, on utilise une antenne d'émission (42) unique mais le signal est reçu par deux antennes différentes (43, 44), le signal de sortie de l'une de ces antennes subissant un retard de phase (45) avant d'être combiné (46) avec l'autre, et avant d'être traité par les circuits récepteurs (47). On peut également introduire le retard de phase (115) au niveau de la bande de base dans les signaux à émettre en faisant tourner les composantes I et Q des ondes avant la modulation.
PCT/US1997/022605 1996-12-17 1997-12-15 Systeme d'amelioration de la qualite d'un signal radio reçu WO1998027663A2 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU55210/98A AU5521098A (en) 1996-12-17 1997-12-15 System for improving the quality of a received radio signal
CA002275283A CA2275283C (fr) 1996-12-17 1997-12-15 Systeme d'amelioration de la qualite d'un signal radio recu
BR9713943A BR9713943A (pt) 1996-12-17 1997-12-15 uência entre um sinal de uma primeira frequência, cia lento, e, processo em um sistema de comunicação digital de salto de frequência lento.
EP97951614A EP0947058B1 (fr) 1996-12-17 1997-12-15 Systeme d'amelioration de la qualite d'un signal radio recu
DE69721048T DE69721048T2 (de) 1996-12-17 1997-12-15 System zur verbesserung der qualität eines empfangenen funksignals
JP52779698A JP4104023B2 (ja) 1996-12-17 1997-12-15 受信無線信号の品質を改善するシステム

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/768,319 US6034987A (en) 1996-12-17 1996-12-17 System for improving the quality of a received radio signal
US08/768,319 1996-12-17

Publications (2)

Publication Number Publication Date
WO1998027663A2 WO1998027663A2 (fr) 1998-06-25
WO1998027663A3 true WO1998027663A3 (fr) 1998-08-06

Family

ID=25082158

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/022605 WO1998027663A2 (fr) 1996-12-17 1997-12-15 Systeme d'amelioration de la qualite d'un signal radio reçu

Country Status (10)

Country Link
US (2) US6034987A (fr)
EP (1) EP0947058B1 (fr)
JP (1) JP4104023B2 (fr)
CN (2) CN100359821C (fr)
AU (1) AU5521098A (fr)
BR (1) BR9713943A (fr)
CA (1) CA2275283C (fr)
DE (1) DE69721048T2 (fr)
TW (1) TW362311B (fr)
WO (1) WO1998027663A2 (fr)

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Also Published As

Publication number Publication date
CN100359821C (zh) 2008-01-02
EP0947058A2 (fr) 1999-10-06
US5991331A (en) 1999-11-23
WO1998027663A2 (fr) 1998-06-25
BR9713943A (pt) 2000-03-21
CA2275283C (fr) 2006-12-05
EP0947058B1 (fr) 2003-04-16
AU5521098A (en) 1998-07-15
JP2001524277A (ja) 2001-11-27
DE69721048D1 (de) 2003-05-22
CN1245600A (zh) 2000-02-23
DE69721048T2 (de) 2004-04-08
CA2275283A1 (fr) 1998-06-25
JP4104023B2 (ja) 2008-06-18
TW362311B (en) 1999-06-21
CN101056134A (zh) 2007-10-17
US6034987A (en) 2000-03-07

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